Merge remote-tracking branch 'origin/在线访问lhj' into 在线访问lhj

tamguo-mms/src/main/java/com/tamguo/web/interceptor/MemberInterceptor.java

@@ -1,55 +1,59 @@
 package com.tamguo.web.interceptor;
 
-import java.net.URLEncoder;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import org.springframework.stereotype.Component;
-import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
+import java.net.URLEncoder;  // 导入用于编码的类
+import javax.servlet.http.HttpServletRequest;  // 导入 Http 请求类
+import javax.servlet.http.HttpServletResponse;  // 导入 Http 响应类
+import org.springframework.stereotype.Component;  // 标记为组件
+import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;  // 继承的拦截器适配器类
 
+/**
+ * MemberInterceptor 类，处理会员相关的拦截器
+ */
 @Component
-public class MemberInterceptor extends HandlerInterceptorAdapter{
+public class MemberInterceptor extends HandlerInterceptorAdapter {  // 继承自拦截器适配器
 
 	/** "重定向 URL"参数名称 */
-	private static final String REDIRECT_URL_PARAMETER_NAME = "redirectUrl";
+	private static final String REDIRECT_URL_PARAMETER_NAME = "redirectUrl";  // 定义重定向 URL 参数名称
 
 	/** 默认登录 URL */
-	private static final String DEFAULT_LOGIN_URL = "/login.html";
+	private static final String DEFAULT_LOGIN_URL = "/login.html";  // 定义默认登录 URL
 
 	/** 登录 URL */
-	private String loginUrl = DEFAULT_LOGIN_URL;
+	private String loginUrl = DEFAULT_LOGIN_URL;  // 定义登录 URL
 
 	/**
 	 * 请求前处理
 	 *
-	 * @param request
-	 *            HttpServletRequest
-	 * @param response
-	 *            HttpServletResponse
-	 * @param handler
-	 *            处理器
+	 * @param request HttpServletRequest
+	 * @param response HttpServletResponse
+	 * @param handler 处理器
 	 * @return 是否继续执行
 	 */
 	@Override
-	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
-		Object currMember =  request.getSession().getAttribute("currMember");
-		if (currMember != null) {
-			return true;
-		} else {
-			String requestType = request.getHeader("X-Requested-With");
-			if (requestType != null && requestType.equalsIgnoreCase("XMLHttpRequest")) {
-				response.addHeader("loginStatus", "accessDenied");
-				response.sendError(HttpServletResponse.SC_FORBIDDEN);
-				return false;
-			} else {
-				if (request.getMethod().equalsIgnoreCase("GET")) {
-					String redirectUrl = request.getQueryString() != null ? request.getRequestURI() + "?" + request.getQueryString() : request.getRequestURI();
-					response.sendRedirect(request.getContextPath() + loginUrl + "?" + REDIRECT_URL_PARAMETER_NAME + "=" + URLEncoder.encode(redirectUrl, "UTF-8"));
-				} else {
-					response.sendRedirect(request.getContextPath() + loginUrl);
+	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {  // 重写预处理方法
+
+		Object currMember = request.getSession().getAttribute("currMember");  // 获取当前会话中的会员对象
+
+		if (currMember!= null) {  // 如果会员对象不为空
+			return true;  // 返回 true，继续执行
+		} else {  // 否则
+
+			String requestType = request.getHeader("X-Requested-With");  // 获取请求头中的"X-Requested-With"
+
+			if (requestType!= null && requestType.equalsIgnoreCase("XMLHttpRequest")) {  // 如果是 XMLHttpRequest 请求
+				response.addHeader("loginStatus", "accessDenied");  // 在响应头中添加登录状态
+				response.sendError(HttpServletResponse.SC_FORBIDDEN);  // 发送禁止访问错误
+				return false;  // 返回 false，停止执行
+			} else {  // 否则
+
+				if (request.getMethod().equalsIgnoreCase("GET")) {  // 如果是 GET 请求
+					String redirectUrl = request.getQueryString()!= null? request.getRequestURI() + "?" + request.getQueryString() : request.getRequestURI();  // 获取重定向 URL
+					response.sendRedirect(request.getContextPath() + loginUrl + "?" + REDIRECT_URL_PARAMETER_NAME + "=" + URLEncoder.encode(redirectUrl, "UTF-8"));  // 发送重定向响应
+				} else {  // 如果是其他请求
+					response.sendRedirect(request.getContextPath() + loginUrl);  // 发送重定向响应
 				}
-				return false;
+				return false;  // 返回 false，停止执行
 			}
 		}
 	}
-
 }